
NE866B1_Hardware_Design_Guide
1VV0301354 Rev. 6
Page
29
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2018-02-28
3GPP Power Saving Mode (PSM)
The NE866 is supporting a new feature introduced in 3GPP Rel.12 that allows the Module
to skip idle mode tasks for a longer time period while still maintaining the NAS context.
This feature permits to reduce the overall power consumption when there is no required
data activity with the network for a long time.
Additional hardware lines are defined to support this feature and to synchronize the
activities with the external Host processor.
PIN DESCRIPTION
Signal
Function
I/O
PAD
LP_WAKE
Low Power Wake Up.
Used to wakeup the NE866 from any of the low
power modes (either modem or apps).
I
D3
SLP_IND
Modem Sleep or PSM indication.
“0” – NE866B1 modem is in Sleep mode / PSM
“1” - NE866B1 modem is not in sleep mode /
PSM
O
G5
NOTE:
SLP_IND signal indicates the status of the modem subsystem only
SLP_IND cannot be used to determine if the entire module is at low
power mode.